When: 2004-08-20

Collection location: Forest Lakes, Arizona, USA [Click for map]

Who: Ron Pastorino (Ronpast)

No specimen available

Southwest version of Europes’ “Caesar’s Mushroom”


Proposed Names

-55% (1)
Recognized by sight
55% (1)
Recognized by sight: I have studied this species, but not published the name. R

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= Observer’s choice
= Current consensus


Add Comment
I’d say that it is long past time to have another science foray to the Sky Islands of AZ…
By: Debbie Viess (amanitarita)
2009-02-25 21:56:58 CST (-0600)

should we plan for something for the monsoon season in 2010? Last time I was there (too long ago!) I was chasing the birds, and the peccaries were chasing me! I’d love to get a chance to look down. And I’d love to collect in that unique habitat, a little bit of biological Mexico intruded into the US.

I’m jealous, Ron. SouthWestern Caesars! Man, I was justing mooning to our new MO friend Gerhard over his Austrian Caesars…but AZ is more in the realm of the possible.

Not the European species…probably…
By: R. E. Tulloss (ret)
2007-10-12 10:22:01 CDT (-0500)

What I know of (this is a serious caveat) that is called “Amanita caesarea” in Arizona is related to the calyptroderma complex in the Pacific coastal states. Amanita caesarea has a deep subhymenium of inflated cells, which is a character I used to define __Amanita stirps Caesarea in the group of “caesar-like” amanitas. There are at least three other groups: One has a shallow subhymenium of inflated cells, has small fruiting bodies, and has plentiful 2-spored basidia (e.g., A. ristichii). One has moderate to large fruiting bodies, a shallow subhymenium of inflated cells, and 4-spored basidia. One has a subhymenium of branching and, usually, not strongly inflated cells (calyptroderma group). Alexander Smith was aware of the latter group as can be told from his notes on microscopic examination of Arizona and New Mexico material sent to him by Barrows.